Add support for building patched_sdk and platform.dill for dart2js:

pkg/front_end/lib/src/fasta/testing/suite.dart

Index: pkg/front_end/lib/src/fasta/testing/suite.dart
diff --git a/pkg/front_end/lib/src/fasta/testing/suite.dart b/pkg/front_end/lib/src/fasta/testing/suite.dart
index 43070d220bd812766101e88f3321b5b9d091f815..604fb0376cb2054dcfe592460985fab1b7bb1f29 100644
--- a/pkg/front_end/lib/src/fasta/testing/suite.dart
+++ b/pkg/front_end/lib/src/fasta/testing/suite.dart
@@ -180,13 +180,15 @@ class Outline extends Step<TestDescription, Program, FastaContext> {
       TestDescription description, FastaContext context) async {
     Program platform = await context.createPlatform();
     Ticker ticker = new Ticker();
-    DillTarget dillTarget = new DillTarget(ticker, context.uriTranslator);
+    DillTarget dillTarget =
+        new DillTarget(ticker, context.uriTranslator, false);
     dillTarget.loader
       ..input = Uri.parse("org.dartlang:platform") // Make up a name.
       ..setProgram(platform);
     KernelTarget sourceTarget = astKind == AstKind.Analyzer
         ? new AnalyzerTarget(dillTarget, context.uriTranslator, strongMode)
-        : new KernelTarget(dillTarget, context.uriTranslator, strongMode);
+        : new KernelTarget(
+            dillTarget, context.uriTranslator, strongMode, false);
 
     Program p;
     try {